54311012521 has 2 divisors, whose sum is σ = 54311012522. Its totient is φ = 54311012520.

The previous prime is 54311012507. The next prime is 54311012549. The reversal of 54311012521 is 12521011345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35872360000 + 18438652521 = 189400^2 + 135789^2 .

It is a cyclic number.

It is not a de Polignac number, because 54311012521 - 2⁵ = 54311012489 is a prime.

It is not a weakly prime, because it can be changed into another prime (54311012501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27155506260 + 27155506261.

It is an arithmetic number, because the mean of its divisors is an integer number (27155506261).

Almost surely, 2^54311012521 is an apocalyptic number.

It is an amenable number.

54311012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54311012521 is an equidigital number, since it uses as much as digits as its factorization.

54311012521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 54311012521 its reverse (12521011345), we get a palindrome (66832023866).

The spelling of 54311012521 in words is "fifty-four billion, three hundred eleven million, twelve thousand, five hundred twenty-one".